Heh there was some ad supported dial up Internet I found. you were supposed to download their browser and it'd dial in and work normal enough.
I noticed it created a windows dial up connection. When you launched the browser the login info worked on this. I could just dial their server and save the username and password and use any browser or game normally.
Was this NetZero? I kind of recall their CDs would do something similar, launch an Ad supported version of Netscape--but if you just copied the Dial-Up connection it made, you could recreate it without the need for the Browser.
Eventually NetZero forced you to use their own dialer to ensure you kept the ads running… but you could spy on the ppp connection by just opening the COM port of your modem in terminal and watching. The password was encrypted (xor?) but you could just copy and paste the value into a regular dialer lol